YADAV, M.R.; GANESH, M.M.; GIRIDHAR, R.; KUMAR, Manoj. Synthesis of 3-Oxo-4-aza-5β-System from (25R)-3-Oxo-A-Norspirostane. Asian Journal of Chemistry, [S. l.], v. 16, n. 2, p. 1027–1033, 2016. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/14574. Acesso em: 23 jul. 2024.